Personally, I rank the Russian SKS's as follows for desirability:
1) non-refurb, unissued
2) non-refurb, issued
3) refurb laminate
4) refurb hardwood.
Now, there was apparently a small number of un-dated star-marked 55/56 manufactured Tulas that were built new with Laminate stocks, but I've never had one and the rifle would need to be looked at as a whole to determine if refurb or not.
All things being equal, an Izhevsk will sell for a slight premium over the equivalent Tula.
My personal "go to" SKS is a non-franken-pinned non-refurb 1952 Tula that was issued but didn;t see rough service from what I can tell, still in about 90%+ condition.
Another thing to watch out for with the laminates is that they are often loose on the actions, meaning the action moves fore and aft in the stock when assembled. It should be as tight as possible for accurate performance.
With a laminate, I generally go to the range a few times and ram a couple hundred rounds through the gun to ensure the action has set back the laminations as much as it's going to. This is because when they machine them, the laminations tear at a different rate leaving an irregular surface at the rear receiver leg.
Once it's "shot in" and set back, there will be even more fore/aft movement. I then epoxy in a hardwood shim of the proper thickness behind the rear receiver leg to snug the action forward until the receiver contacts the metal stock bolt solidly. It should stay tight after that and your groups will shrink accordingly if you do your part
The hardwood stocks are less prone to this issue, but are less durable in other ways.